Photosynthetic Characterization of Yield Variations of Alfalfa under Greenhouse Conditions for First Year

doi:10.11733/j.issn.1007-0435.2015.02.014

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (2): 310-315.DOI: 10.11733/j.issn.1007-0435.2015.02.014

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Photosynthetic Characterization of Yield Variations of Alfalfa under Greenhouse Conditions for First Year

LI De-feng¹, LI Pu-fang², MA Bao-luo³, WANG Cheng-zhang¹

1. College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou, Henan Province 450002, China;
2. School of Life Science, Lanzhou University, Lanzhou, Gansu Province 730000, China;
3. Eastern Cereal and Oilseed Research Centre, Ottawa, Canada

Received:2014-06-17 Revised:2014-12-01 Online:2015-04-15 Published:2015-03-25

温室盆栽1年紫花苜蓿产量和光合速率的变化规律

李德锋¹, 李朴芳², 马保罗³, 王成章¹

1. 河南农业大学牧医工程学院, 河南郑州 450002;
2. 兰州大学生命科学学院, 甘肃兰州 730000;
3. 加拿大农业部东方谷物研究中心, 渥太华

通讯作者: 马保罗, 王成章
作者简介:李德锋(1978-),男,河南新乡人,讲师,博士研究生,研究方向为草业科学,E-mail:Leadephone@126.com
基金资助:
国家牧草产业技术体系(CARS-35);加拿大项目资助

Abstract

Abstract:

Alfalfa (Medicago sativa) is usually harvested 3～6 times annually. The biomass yields of first cut in the spring are generally the highest in practice. The yields are then declining in the following cuts. This seasonal reduction in alfalfa biomass yields could be associated with prevailing changes in environmental factors such as rainfall and heat stress or due to biological characteristics of alfalfa itself. In order to answer this question even clearly, 8 alfalfa varieties were grown under the controlled greenhouse conditions with suitable temperature, light, water and nutrient supply to determine the driving force of biomass yield variations of alfalfa genotypes. Another 4 alfalfa varieties were chosen to repeat the experiment in the second year. The results showed that the biomass yields of the alfalfa plants increased from first cut to third cut. The yields after third cut were stabilized. The biomass yields of alfalfa remained similar or even increased from the first to last cut without high temperature, water deficit and nutrient limitations. These data implied that dry matter yield was positively correlated with plant height and leaf weight.

Key words: Alfalfa, Cut, Yield, Chlorophyll, P_n

摘要：

采用盆栽方法,将8个紫花苜蓿(Medicago sativa)品种播种在智能温室内,保持一致的适宜温度、光照和水肥环境,探讨其各茬产量、叶绿素和光合速率的变化规律.为验证第1年得到的试验结果,第2年另选4个紫花苜蓿品种在相同生长条件下重复本试验.结果表明:在适宜的光、温、水肥条件下,紫花苜蓿播种后第1～3茬产量逐渐升高,之后基本保持稳定.第1～6茬初花期收获时株高、叶绿素含量和净光合速率变化不大,大部分茬次间差异不显著.相关分析表明,株高、单叶重与产量成正相关.综合分析认为,紫花苜蓿各茬产量主要受环境的影响,温室栽培下生长至一定时间时,产量可保持稳定.

关键词: 紫花苜蓿, 茬, 产量, 叶绿素, 净光合速率

CLC Number:

S541

LI De-feng, LI Pu-fang, MA Bao-luo, WANG Cheng-zhang. Photosynthetic Characterization of Yield Variations of Alfalfa under Greenhouse Conditions for First Year[J]. Acta Agrestia Sinica, 2015, 23(2): 310-315.

李德锋, 李朴芳, 马保罗, 王成章. 温室盆栽1年紫花苜蓿产量和光合速率的变化规律[J]. 草地学报, 2015, 23(2): 310-315.

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Photosynthetic Characterization of Yield Variations of Alfalfa under Greenhouse Conditions for First Year

温室盆栽1年紫花苜蓿产量和光合速率的变化规律

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